Grain-separator



"W. C. HINDS. GRAIN SEPARATOR. APPLICATION FILED Aue.5, 1919.

1,333,757. I Patented Mar.16, 1920.

v I-uferffi? weezer f iwiinntna c. KINDS, .oij cnnnvnflitnmois.

- Applicationfiled-August'5 T allfwhom itmag concern "Be it known that I, TI-remain H nes, a citizen of the United States, and resident ofGeneva county oi Kane, and State of Illinois, have invented certain' new and usedrawings, forming a partthereof.

The invention relates to threshing Ina-'- Y chines wherein the grain is released irom the earsby the coaction of a'revolvingitoothed.

cylinder and a plurality of stationary toothed bars arranged to provide a curved breast, commonly termed the concave. ,The usual practice in these machines has been to alternate the toothed bars of the concave with grating sections having relatively narrow openings for the passage of grain through the same, and to supply such a grating section .beyond the rearmost row. of concave teeth. Sometimes instead of the rear grating section a blank or imperforate section has been supplied by the separator man- 'ufacturers through which no grain could pass. A defect in the practice has been that ithe graiir could notfreely escape from the straw when released from the ears whereby a larger proportion of the grain was swept on to the shakers than could be separated by 'these devices, with the result that not all vof the grain was'recovered An object of the present invention is to provide a grating having relatively wide openings through which grain may immediately fall away from the straw when released from the ears, and further to provlde a positive stop or abutment by which the grain, which is thrown forwardly by the cylinder. is deflected through the said openings.

A form of the invention chosen for purposes of illustration is shown inthe'accom- V panying drawings, in which ment, and V the invention with the said stop or abutment 1 applied thereto, V

Fig. 3 is a detailplan view of the grating and abutment,

- Fig-.4 is a detail-side view of-the'abut- Figs. 5 and 6 show details of the grating,.

Fig. 5 being'adetail'side elevation of one of.v

. h as v been done. .pends upon the theory that the grain should be separated from the straw at this point in- I 1919. Serial No. 315,422.

the gratingbars and Fig.6 being a perspectlve view of a spacing block in inverted position.

--A usualio'rm of toothed cylinder :11, and a concave comprising alternate toothed bars and gratings 12Jandi13, is shown in Fig. ;1.

The structure embodying the present inven-- tion is preferably located immediately beyond the last grating bar 13v of the concave. "lvlien the graina'nd straw have passed the last of the concave teeth, substantially. everything that is done in-thejwhole separating i specificati nemi r te f Patented Mar. 16, 1929.

machine to loosen the grain from the ears The present invention destead of being swept on with the straw and laboriously shaken therefrom 7 during its course through the remainder of the machine. Separation of the grain and straw at this point is facilitated by the fact that the grain, being heavier than the straw, will travel in the lower portion of the stream of straw and grain, and, due to the blows of the cylinder teeth traveling at a high velocity, will tend to leave the path of those teeth at a tangent thereto.

For the purpose of allowing the grain to drop away from the straw there is shown an open. grating lat comprising a plurality of bars, as-15, which extend in the direction of the length of the cylinder 11 and are separated by spacing blocks 16, the bars and spacingblocks being tied together bybolts,

as 18. The-assembled grating is preferably of such a length and width as to be interchangeable with the blank or solid bar.

(not :shown)-' usually supplied by the sepa rator' mamrfacturers to provide an exten'-- Ision of theconcavebeyond the last grating bar 13. V

To positively arrest the grain which; is thrown forwardly by the cylinder, .so thatit may fall through the relatively wide spaces in the grate 1%, an abutment in the form of a thin bar 19 isprovided at'the far edge of the grating. As shown, the bar 19 is secured against the back of the last one of the barsv 15 by the samebolts 18 which unite the parts of the grating and it is made adjustable in height by being provided with slotted openings for the said bolts back of, the bars 15. Y

It has been found in practice that with the V i grating 14: so located that a height. of abutment 19 of substantially one-quarter of an inch will just clear the cylinder teeth, f

nearly all the grain Will be recovered through the grating. The chaff, being the lightest portion of the materialpassing the cylinder, is sWept over the abutment 19 with the straw, leaving the grain substantially,

clean. This action is so complete that it has been found p 'acticable to operate a machine of the usual type except for the present invention, Without the operation of the fan commonly employed for separating the chaff from the'grain. It will also be understood that there is very little grain to be separated from the straw upon the shakers (not shown). These accordingly operate more effectively and substantially all of-th'e grain is recovered. V

I claim as my invention:

1.111 a grain separator, in combination,

revo'luble threshing means, means lying in common surfaceto allow the grain to drop away from the straw immediately upon being released from the ears, and means projecting above said surface to a position closely adjacent a point of tangency With the arrest the v jecting above the surface thereof.

, path of said revoluble threshing means to gram and over WlllOll the straw and chaff may pass.

2. A grating for a grain separator con cave comprising a plurality of bars spaced relatively idely apart, their upper edges lying substantially in a common surface, an

abutment at the far edge of the grating pro 3. A gratingfor a grain separator concavecomprismg a plurallty of bars spaced relatively Widely apart, an abutment carried by the grating at its far edge and project-' ing abovethe same, and means for vertical adjustment of the abutment.

4:. A grating for a grain separator concave comprising a plurality of relatively thin bars, relatively thick spacing blocks between said b11'S,'"bOltS p'assed'through said bars and blocks and an abutment projecting above the bars and spacing blocks adjustably secured thereto by said bolts.

WHEELER 0. HINDS. 

